Asymmetric Epoxidation of Allylic Alcohols Catalyzed by Vanadium–Binaphthylbishydroxamic Acid Complex
作者:Masahiro Noji、Toshihiro Kobayashi、Yuria Uechi、Asami Kikuchi、Hisako Kondo、Shigeo Sugiyama、Keitaro Ishii
DOI:10.1021/acs.joc.5b00185
日期:2015.3.20
acid (BBHA) complex-catalyzed asymmetric epoxidation of allylic alcohols is described. The optically active binaphthyl-based ligands BBHA 2a and 2b were synthesized from (S)-1,1′-binaphthyl-2,2′-dicarboxylic acid and N-substituted-O-trimethylsilyl (TMS)-protected hydroxylamines via a one-pot, three-step procedure. The epoxidations of 2,3,3-trisubstituted allylic alcohols using the vanadium complex of
描述了钒-联萘基双异羟肟酸(BBHA)络合物催化的烯丙醇不对称环氧化。由(S)-1,1'-联萘-2,2'-二羧酸和N-取代-O-三甲基甲硅烷基(TMS)-保护的羟胺通过单-羟基合成旋光的基于联萘的配体BBHA 2a和2b。锅,分三步操作。使用2a的钒配合物,在TBHP水溶液中轻松地进行使用2a的钒配合物进行的2,3,3-三取代的烯丙醇的环氧化,从而得到具有良好对映选择性的优良(2 R)-环氧醇。